SU1652603A1

SU1652603A1 - Hydraulic unit for prop

Info

Publication number: SU1652603A1
Application number: SU894687076A
Authority: SU
Inventors: Сергей Иванович Швыряев; Анатолий Алексеевич Подколзин; Леонид Семенович Полей
Original assignee: Подмосковный Научно-Исследовательский И Проектно-Конструкторский Угольный Институт
Priority date: 1989-05-06
Filing date: 1989-05-06
Publication date: 1991-05-30

Abstract

Изобретение относитс к горным машинам и может быть использовано в системах управлени механизированными креп ми . Цель - повышение эксплуатационной надежности. Стоечный гидроблок включает корпус 1 с седлом 2 со ступенчатыми отверсти ми , каждое из которых сообщено с радиальным каналом корпуса 1 дл соединени с подвод щими и отвод щими полост ми. В отверстии меньшего диаметра установлен шток 9, к которому жестко прикреплен размещенный в отверстии большего диаметра поршень 10 и поршень в виде золотника 3. На золотник 3 надета коаксиальна трубчата гильза 5 Торец золотника 3 контактирует с толкателем 15, который уплотнен кольцом 16 и расположен в расточке разгрузочного поршн 17. В выполненном в корпусе 1 дополнительном отверстии большего диаметра установлен дополнительный поршень 21, уплотненный кольцом 22, который образует полость 23, св занную с подвод щим радиальным каналом 24 кана- ,юм 25 Радиаль 1ым каналом 26 гидроблок соединен с поршневой полостью гидростойки. Через радиальный канал 27 рабоча жидкость подаетс в разгрузочную камер 20. 5 ил (/)The invention relates to mining machines and can be used in control systems for mechanized supports. The goal is to increase operational reliability. The rack-mount hydraulic unit includes a housing 1 with a saddle 2 with stepped holes, each of which is in communication with a radial channel of the housing 1 for connection with the inlet and outlet cavities. A rod 9 is installed in a hole of a smaller diameter, to which a piston 10 and a piston in the form of a spool 3 rigidly attached are placed in a hole of a larger diameter. The spool 3 is fitted with a coaxial tubular sleeve 5 discharge piston 17. An additional piston 21 is mounted in an additional hole of larger diameter made in the housing 1 and sealed by a ring 22 which forms a cavity 23 connected to the inlet radial channel 24 ka a-, yum 25 radials 26 first channel hydraulic unit connected to the piston cavity gidrostoyki. Through the radial channel 27, the working fluid is supplied to the discharge chamber 20. 5 sludge (/)

Description

9 7 89 7 8

Фиг IFIG I

11 W11 W

7 87 8

11 Ю 12 g 1311 S 12 g 13

1414

2121

15 172015 1720

Фиг ЛFIG L

8eight

2 32 3

I 7 /I 7 /

76 26 Ц 2476 26 C 24

(риг 5(rig 5

Claims

Claim

Rack valve body, including housing with saddle with stepped openings, each of which communicates with a radial channel of the housing for connection with inlet and outlet cavities, a rod installed in a hole of a smaller diameter, to which ¹ placed in holes of a larger diameter are rigidly attached the pistons of the middle part sealed by diameter, covered by coaxially arranged tubular sleeves, pressed against the stops made in the form of ledges of the housing, and races; put on the opposite ends of the rod with the possibility of interaction with the latter piston of the chamber under pressure, and the unloading piston with a pusher, characterized in that, in order to 5 increase operational reliability, the chamber under pressure is made of gas, the rod on which the piston is mounted chamber located PDU pressure, coupled with a rod on which rest the pistons are fixed, through lock ^0, and the housing is formed with an additional hole is provided with a larger diameter and arranged therein complement lnym piston cavity through which an additional channel formed in the housing 5 is connected to a radial channel to communicate with the inlet cavity.

FIG.

2 t L fig.h-

FIG. 5